Nut-lock.



N0. 738,598. PATENTED SEPT. 8, 1903;

J. v; BERRY.

H0 MODEL.

WITNESSES:

Patented September 8, 1903: l

JOHN v. BERRY, or SHAMOKIN, PENNSYLVANIA, ASSIGNOR or ONE-HALF TOCHARLES A. BARRON, OF SHAMOKIN, PENNSYLVANIA.

NUT-LOCK.

SPECIFICATION forming part of Letters Patent No. 738,598, datedSeptember 8, 1903.

Application filed June 26, 1903. Serial No. 163,171. (No model.)

To all whom it may concern:

Be it known that I, JOHNlV'. BERRY, residing in Shamokin, in the countyof Northumberland and State of Pennsylvania, have invented certain newand useful Improvements in Nut-Locks, of which the followingis aspecification.

This invention relates to an improvement in screws and nuts, and moreparticularly to the subclass known as nut and bolt looks.

The object of the invention is to furnish a ready and efficient means ofsecuring in any desired position nuts to bolts in such a manner that thenuts may not become loosened by jarring or by any turning of the boltsor other parts to which they are attached.

With these objects in view the invention resides, essentially, in thevarious arrangement and combination of the parts, as herethe shorter ofthe two'said lugs F.

features pointed out in the claims.

The invention is illustrated in the accompanying drawings, forming apart of this specification, and in which- Figure 1 is a viewillustrating my invention in use, the locking-nuts being shown insection. Fig. 2 is a detail View of the lockingnuts with the lower nutinsection. Fig. 3 is a perspective view showing the locking-nuts separatedand in position ready for connection. Fig. 4 is a sectional plan viewtaken on line w a; of Fig. 1, and Fig.5 is a similar nut with the partsshown adjusted to locking position.

In the drawings, Arepresents a bolt having for aportion of its lengthrightand left i crew-threads B,substantially as shown in In practicingmy invention I employ a locking-nut constructed in two parts, consistingof a lower member 0 and an upper reduced member D. The lower member 0 isconstructed with a substantially annular recess E, havinginwardly-projecting lugs F F and parallel fiat sideedges G G, the latterof which is the longer, as clearly shown in Figs. 3, 4, and 5. It willbe noticed that the lugs F are shorter than the similar lugs F and thatthe lugs F on the side edge G is The side walls of the recess E in thelower member O are formed inclining, as indicated at E.

(See Fig. 2.) I In further carrying out my invention I provide the outermember D with a dependingv neck H, having an enlarged head I at itslower end. -(See Figs. 1, 2, and 3.) The head I is formed with twoparallel flat side edges J J, the latter being the longer and tivemembers and that the threads in the opening M are of reverse directionto the threads in the opening L.

In using my improved locking-nut its lower member C is started on theright threaded end B of the bolt A and turned thereon until the forwardend of the bolt is about to enter the threaded opening M in the memberD, the latter being pulled out and its head I adj usted to position inthe greater diameter of the recess E in the member 0, as shown in Fig.

2. In this position of the parts the member D is imparted a slight turnin reverse direction to which the member 0 was turned. This action willscrew the member D on the reverse or left threads of the bolt. Obviouslythis action of the member D will cause it to move closer to the member0; but it is apparent that the turning action imparted to the member Dshould be limited to prevent binding action of the head I with theinclined side 0 walls E of the recess E, which latter action takes placewhen the member D is screwed home-that is, in contact with the member C.Now continue turning first the member 0 to the right and the member D tothe left. 5 Both members will be screwed on the bolt until the member 0is in engagement with the work or securing position. In this position ofthe parts, which would be as shown in Fig.

2, the two members may be locked against loosening from jarring actionor any turning thereof by a slight turn of the member D, ef-

(See Figs. 65

fecting adjustment of the head I in the recess E to position with itsside edges in frictional contact with the inclined sides E of the recessThe reduced outer member D (see Fig. 1)

enables grasping of the inner member 0 with a wrench, whereby it may beturned without action on the memberD. In other words, with thisconstruction of the members the under thereof is adapted to be turnedand then the outer thereof be turned with action of the wrench upon onemember, as will be understood.

Having thus described my invention, what I claim as new, and desire tosecure by' Letters Patent, is-

1. A nut-lock consisting of a right and left screw-threaded bolt, and alocking-nut constructed in two members, one thereof having right and theother left screw threads as specified, an annular recess in one member,inwardly' projecting lugs and parallel overhanging flat edges in saidrecess, a depending neck on the other member, with a head at its lowerend having parallel fiat edges and curved portions, and notches in theedges of the head, substantially as described.

2. A nut-lock consisting of a right and left screw-threaded bolt and alocking-nut constructed in two members, one thereof having was 3. Anut-lock consisting of a right and left screw-threaded bolt, and alocking-nut constructed in two members, one thereof having right and theother left screw-threads as specified, an annular recess in one memberhaving inwardlyinclined side walls, inwardIy-projecting lugs andparallel overhanging flat edges, in said recess, a depending neck on theother member, a head at the lower end of said neck, having parallel fiatedges and curved portions, and notches in the edges of the head,substantially as described.

4. The combination with a right and left screw-threaded bolt, of alocking-nut consisting of two members one thereof having right and theother left screw-threads, said mem bers being constructed withconnecting means having, limited separating movement and means effectingbinding action between them when they are screwed home to lockingposition substantially as described.

JOHN V. BERRY. Witnesses:

WM. E. RESSLER, GEO. W. RYON.

